Blender Exposure not affecting output on OpenEXR File
So it seems I got fooled by the &quot;viewed&quot; image,

I think it's blown up ,and unusable image
but after I put the EXR Image to Davinci Resolve, all the information is still there,
the image is not exposed correctly ofcourse, but the information is still there,
we will need extra effort to re-expose the image.
Before exposure fixing:

After exposure fixing:

so the conclusion is, while the view is super blown out,
if we render in OpenEXR 16bit or 32bit, the information is still there
and we can just pull and correct the exposure using the &quot;hidden&quot; image information